Watch the compilation, not the show.
Set in the backdrop of the Russo-Japanese war, which is information completely useless to this series in the long run, Lime-iro Ryuukitan X is the successor to Lime-iro Senkitan. While the production on the first show is better, especially where the nipples are concerned, this show does deliver.
Unfortunately it is nearly unwatchable except on mute because the protagonist is a mentally addled person that communicates mostly through screaming at the top of his lungs. A fact that he claims makes him a man. A dubious claim, however, as most of the runtime is spent detailing how the five girls in his harem cannot wait to get his dick six inches within them. Which, of course, never happens.
The enemy Farden Knights, while never shown nude, are drawn that way. The “clothing” is then colored in. This is nearly always the case when the navel is still shown. This is a common technique used in western comics to show off the musculature of the men. However, it’s a total win when used with women because technically they are naked. I can’t recommend watching this show. The good bits have been distilled into this compilation.